
Second byte
Register content
DA0 to DA7
Register name
State
Function
Note
7
—
0
Second byte identification code
6
TST
0
Normal operation
Test mode should not be used. This bit
1
Test mode
should always be zero.
5
CHAL
0
Sets the character intensity level to about 85 IRE (bright white).
Switches the character intensity level.
1
Sets the character intensity level to about 72 IRE (white with a
touch of grey).
4
BKL
0
Sets the blanking intensity level to about 3 IRE (a deep black
Switches the blanking intensity level.
as a frame level).
1
Sets the blanking intensity level to about 13 IRE (a dark grey
as a frame level).
3
RSL1
0
1
Switches the background intensity level.
2
RSL0
0
1
CVoutmt
0
Normal CVout output
1
CVout pedestal level output
0
XTALsel
0
Selects XTAL1
Switches the oscillator circuit
1
Selects XTAL2
Note: When the chip is reset by the RST pin, the register states (bits) are all cleared to 0.
~ COMMAND6: Display Control Setting Command 3
First byte
Register content
DA0 to DA7
Register name
State
Function
Note
7
—
1
6
—
1
The command 6 identification code:
5
—
1
sets display control parameters.
4
—
0
3
MOD3
0
Sets Fsc to 3.58 MHz.
The logical or of this bit and the Fsc
1
Sets Fsc to 4.43 MHz.
switching input pin (pin 14) is used.
2
MOD2
0
Sets the color mode to NTSC.
The logical or of this bit and the color
1
Sets the color mode to PAL.
mode switching input pin (pin 13) is
used.
1
MOD1
0
Sets the number of scan lines to 525 lines.
The logical or of this bit and the scan
1
Sets the number of scan lines to 625 lines.
line count switching input pin (pin 12) is
used.
0
MOD0
0
Sets the mode to a mode other than SECAM.
The logical or of this bit and the mode
1
Sets the mode to SECAM mode.
switching input pin (pin 11) is used.
LC74763, 74763M
No. 5039-11/19
RSL1
RSL0
Intensity level
Amplitude
0
About 15 IRE
About 60 IRE
0
1
About 30 IRE
About 60 IRE
1
0
About 45 IRE
About 60 IRE
1
About 55 IRE
About 65 IRE